A grep command to search for a popular string in a vendor/ directory.

It aims to be more efficient (performance, readability) than what IDE commonly do :

grep -rlP 'sylius\.grid' vendor/ | grep -vP 'xml|Test|rst'

1. Find all occurences in vendors -r vendor/ with a regex -P for 'syliusDOTgrid', 'DOT' being a real dot between 'sylius' and 'grid', but only display file names -l to avoid dozens of matches being in those files
2. Pipe | results and exclude grep -v with a regex -P files containing 'xml', 'Test' or 'rst' xml|Test|rst in their path, since these files usually have lots of occurences and not the golden piece of code you search for ;)

It remains simple to write and efficient, do you have other tips with grep?